Ball point pen



May 1, 119 M. A. FERST ETAL BALL POINT PEN 2 Sheets-Sheet 1 Filed Jan.23, 1947 m m A w T T M E N 8 R N E R E A R VERG 0 NFQU T .1. Ms T .H AHAs M A E h. H m m MLN Y B Q U May 119 1951 M. A. FERST ET AL 2,551,490

M oooooooooo s'r RE AAAAAAAAAAAAA N Patented May 1, 1 951 UNITED STATESPATENT orrics BALL POINT PEN Monie A. Ferst, Leon H. A'sh ore, andNathan 'Sugarman, Atlanta, Ga., assign'ors to Scripto, 'Inc., Atlanta,'Ga., a corporation of Georgia Application January 23, 1947.,ISer ialNo.723 800 1 Claim. (01. ran -42.4 I

The invention relates to ball pointed pens (and has an object theprovision of a pen of this character with improved ink feed.

It is an object of the invention to provide a pen of the characterreferred to having a removable and renewable cartridge to contain theusual Viscous type of ink used in such pens.

It is a further object of the invention to provide a pen which may beused in writing at a lower angle to the paper than is usual with pens ofthis type.

Further objects will appear from the following description when read inconnection with the accompanying drawings showing illustrativeembodiments of the invention and wherein:

Figure 1 is a central vertical section;

Fig. 2 is a vertical detail section of the tip of the structure shown inFigure 1, drawn to an enlarged scale;

Fig. 3 is a view similar to Fig. 2 showing a different form of the tip;

Fig. 4 is a detail central section on a much enlarged scale of the ballpoint and ink feed provisions closely adjacent to the ball;

Fig. 5 is a side elevation of the insert carrying the ball seat;

Fig. 6 is an end View of the structure of Fig. 5 seen from the rightthereof;

Fig. 7 is a detail vertical section corresponding to Fig. 2 but drawn toa larger scale and showing a structure for a low Writing angle; and

Fig. 8 is an end View of the structure shown in Fig. 7, as seen from theleft.

As shown, the device comp-rises a barrel 50 having a cap I l screwthreaded thereto and a portion 12 having a press fit with the barrel.The pen further comprises a tip l3 and an insert M formed for a pressfit in the tip l3. The portion l2 has at its upper end an insidediameter sufiicient to receive a portion of the body of a removablecartridge I5, which cartridge is formed with a reduced portion I6 toslip readily within the bore ll of the tip IS. The reduced portion it ofthe cartridge is adapted to rest upon a shoulder IS in the tip l3 in theform shown in Fig. 2 or upon the upper surface I9 of the insert [4' ofFig. 3.

The cartridge is shown as being provided with a follower 20 to contactthe upper surface of the ink therein as the surface lowers through use.2 i and the cartridge will in storage be provided with a cap, notshown, fitting over the reducedportion .16, and with a sealing film 2|at its :upper end.

'To renew a cartridge in the pen, the cap I! would be unscrewed and theold cartridge removed. A new cartridge will have its film 2| broken insome manner by pricking or scratching with a sharp instrument eitherbefore or after insertion into the barrel of the pen. When the cap II isscrewed in place the projection 22 will come into contact with the film2! and cause the follower 20 to be pressed slightly toward the ball Ofthe pen to start the flow of ink toward the insert I 4.

The insert I4 is shown as formed with a concave ball seat 23 and withradial feed channels 24 shown as four in number, although it will beunderstood that a less or greater number of channels may be provided asdesired and in accordance with the character of the ink utilized. Theinsert I4 is also shown as formed with a surplus ink chamber 25, theopening of which chamber is surrounded by an unbroken concave surfacebetween the opening of the chamber and the cutting through of thechannels 24. The form of Fig. 3 omits the shoulders 26 which in the formof Figure 1 seats against the portion I2 of the pen and therefore, theneck 2'! of the form of Fig. 3 can, if desired, be made slidable in theportion l2 and prevented from retrogression in use in any desiredmanner.

It is to be understood that the ball 28 which acts as a m'b in themanner usual with this type of pen is retained in the tip by reaming orswaging of the material of the tip at the point 29 indicated in Fig. 4.It is also to be understood that the ball is retained between theinwardly flaring lip about the ball retaining opening 29 and the concaveseat 25 and is provided with a small predetermined clearance to allow afilm of ink to be carried upon the ball as it rolls to be deposited uponthe paper to form the writ, ing line.

In the form of Figs. 7 and 8, a portion of the material of the tip isremoved as indicated at 30 tonot contact the paper even though the penis used as at low an angle as that indicated in Fig. 7.

In use the viscous ink moves downwardly in the feed channels 24 to forma body of ink in the annular space 3|, Fig. 4, thus securing access tothe surface of the ball. As the ball rolls a certain amount of the inkis deposited upon the surface to bear the writing, and surplus ink iswiped off from the ball at the point 31 in the chamber 25, assuming thatthe ball is revolving in the direction shown by the arrow on Fig. 4.

There will, therefore, be a body of surplus ink in the chamber 25 whichwill supplement the ink flowing to annular chamber 3| thus greatlyimproving the dependability of the pen for writing purposes.

It is obvious that the structure may be used without the cartridge l5,in which case the viscous ink or ink paste commonly used with this typeof pen will be contained in the barrel [0 and passage I! to feed to theradial slots 24 in the insert 14 or I4 and thus to the nib ball. In suchuse the follower 20 if utilized would slide in the barrel itself.

Minor changes may be made in the physical embodiments of the inventionwithin the scope of the appended clainrwithout departing from the spiritof the invention.

' We claim: I

A ball pointed pen comprising, in combination: 'a hollow barrel; aremovable end portion opposite the writing tip of the pen; a renewablecar- 4 tridge seated in the barrel and provided with an ink follower;and an axial rod carried by said end projecting axially therein toinitially press against said follower when the cartridge is full of ink.

MONIE A. FERST. LEON H. ASHMORE. NATHAN SUGARMAN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 600,299 Werner Mar. 8, 18981,527,971 Forsell Mar. 3, 1925 1,935,000 Vessey Nov. 14, 1933 2,265,055Biro Dec. 2, 1941 2,390,636 Biro Dec. 11, 1945 2,426,453 HuenergardtAug. 26, 1947 2,428,960 Cloutier Oct. 14, 1947 2,438,786 Moore Mar. 30,1948 FOREIGN PATENTS Number Country Date 366,218 Germany 1923 218,660Switzerland 1942

